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avatar+262 

i do not understand how i should do it

 Mar 12, 2021
 #1
avatar+31281 
+2

Between 1 month and two months the charge increases 30 dollars

     so they charge 30 dollars per month      at one month the charge   is 80 dollars....30 of this is monthly charge, so 50 dollars is one-time charge

 

4 months should be    4 m * $ 30 /m   +  $ 50 = $170.

 Mar 12, 2021

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